great model with perfect fit. The magnet tolerances are just enough to get the magnets in and hold them. I tried to insert the magnets by hand it gave up pretty quickly. I ended up attaching a magnet to the bottom of an Allen bit and then using the Allen bit to position it before giving it a little tap w a hammer. Worked perfect. They also fit great inside the sockets. The only problem I have with the model, is that it only comes in metric and on in imperial/SAE sizing lol.